LP8340C National Semiconductor, LP8340C Datasheet

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LP8340C

Manufacturer Part Number
LP8340C
Description
Low Dropout/ Low IQ/ 1.0A CMOS Linear Regulator
Manufacturer
National Semiconductor
Datasheet

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© 2003 National Semiconductor Corporation
LP8340
Low Dropout, Low I
General Description
The LP8340 low-dropout CMOS linear regulator is available
in 5V, 3.3V, 2.5V, 1.8V and adjustable output versions. Pack-
aged in the 6ld LLP package and 3ld DPAK. The LP8340 can
deliver up to 1.0A output current.
Typical dropout voltage is 420mV at 1.0A for the 5.0V ver-
sion, 540mV at 1.0A for the 3.3V version, 670mV at 1.0A for
the 2.5V version and 680mV at 800mA for the 1.8V version.
The LP8340 includes a zener trimmed bandgap voltage
reference, foldback current limiting and thermal overload
limiting.
The LP8340 features a PMOS output transistor which unlike
PNP type low dropout regulators requires no base drive
current. This allows the device ground current to remain less
than 50µA over operating temperature, supply voltage and
irrespective of the load current.
Typical Applications
DS200609
Q
, 1.0A CMOS Linear Regulator
Adjustable V
Fixed V
Features
n
n 420mV Typical Dropout
n Wide Operating Range
n Internal 1.0A PMOS Output Transistor
n 19µA Typical Quiescent Current
n Thermal Overload Limiting
n Foldback Current Limiting
n Zener Trimmed Bandgap Reference
n Space saving LLP package
n Temperature Range
Applications
n Hard Disk Drives
n Notebook Computers
n Battery Powered Electronics
n Portable Instrumentation
OUT
±
— LP8340C
— LP8340I
OUT
1.5% Typical V
OUT
tolerance
20060901
20060902
@
1.0A (V
O
= 5V)
−40˚C to 125˚C
October 2003
www.national.com
0˚C to 125˚C
2.7V to 10V

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LP8340C Summary of contents

Page 1

... Internal 1.0A PMOS Output Transistor n 19µA Typical Quiescent Current n Thermal Overload Limiting n Foldback Current Limiting n Zener Trimmed Bandgap Reference n Space saving LLP package n Temperature Range — LP8340C — LP8340I Applications n Hard Disk Drives n Notebook Computers n Battery Powered Electronics n Portable Instrumentation Fixed V ...

Page 2

... LP8340ILD-ADJ LP8340ILDX-ADJ LP8340ILD-1.8 LP8340ILDX-1.8 LP8340ILD-2.5 LP8340ILDX-2.5 LP8340ILD-3.3 LP8340ILDX-3.3 LP8340ILD-5.0 LP8340ILDX-5.0 3-Pin DPAK LP8340CDT-1.8 LP8340CDTX-1.8 LP8340CDT-2.5 LP8340CDTX-2.5 LP8340CDT-3.3 LP8340CDTX-3.3 LP8340CDT-5.0 LP8340CDTX-5.0 LP8340IDT-1.8 LP8340IDTX-1.8 LP8340IDT-2.5 LP8340IDTX-2.5 LP8340IDT-3.3 LP8340IDTX-3.3 LP8340IDT-5.0 LP8340IDTX-5.0 www.national.com Package Marking Transport Media 1k Units Tape and Reel L041B 4.5k Units Tape and Reel ...

Page 3

Connection Diagrams 6-Pin LLP FIXED OUTPUT VOLTAGE Bottom View Note: V Pins (Pin 1 & 6) must be connected together externally for full 1 amp operation (500mA max per pin Sense (Pin 5) must be connected to V ...

Page 4

... Sense, ADJ IN OUT OUT Storage Temperature Range Junction Temperature ( Power Dissipation ESD Rating LP8340C Electrical Characteristics Unless otherwise specified all limits guaranteed for V the full operating temperature range of T Symbol Parameter V Input Voltage IN V Output Voltage OUT ∆V Load Regulation O ∆ ...

Page 5

... LP8340C Electrical Characteristics Unless otherwise specified all limits guaranteed for V the full operating temperature range of T Symbol Parameter V − V Dropout Voltage LP8340-1 (Note 7) (Note 8) I OUT LP8340-2.5 I OUT LP8340-2.5 I OUT LP8340-3.3 LP8340-ADJ, V LP8340-3.3 LP8340-ADJ, I LP8340-5.0 I OUT LP8340-5.0 I OUT I Quiescent Current ...

Page 6

LP8340I Electrical Characteristics Unless otherwise specified all limits guaranteed for V the full operating temperature range of T Symbol Parameter V Output Voltage OUT ∆V Load Regulation O ∆V Line Regulation O V − V Dropout Voltage IN O (Note ...

Page 7

LP8340I Electrical Characteristics Unless otherwise specified all limits guaranteed for V the full operating temperature range of T Symbol Parameter T Thermal Shutdown SD Temp. Thermal Shutdown Hyst. ADJ Input Leakage V Current V Leakage Current LP8340-ADJ OUT ADJ = ...

Page 8

Typical Performance Characteristics Unless otherwise specified Output Voltage Change vs. Temperature Ground Current vs. Temperature (I Ground Current vs. Input Voltage www.national.com + 1.5V 10µF X7R ceramic OUT 20060907 ...

Page 9

Typical Performance Characteristics LP8340-1.8V Min V Load Transient Response Start-up Response (Continued) IN 20060919 Line Transient Response (I 20060913 Minimum Input Voltage Rise Time 20060915 9 LP8340-ADJ Min V IN 20060920 = 10mA) LOAD 20060914 20060921 www.national.com ...

Page 10

Typical Performance Characteristics Minimum Input Voltage Rise Time Minimum Input Voltage Rise Time www.national.com (Continued) Minimum Input Voltage Rise Time 20060922 Minimum Input Voltage Rise Time 20060924 10 20060923 20060925 ...

Page 11

Applications Section GENERAL INFORMATION The LP8340 is a low-dropout, low quiescent current linear regulator. As shown in Figure 1 it consists of a 1.25V refer- ence, error amplifier, MOSFET driver, PMOS pass transistor and for the fixed output versions, an ...

Page 12

Applications Section START UP CONSIDERATIONS Under certain operating conditions, overshoot of V start-up can occur. The observed overshoot is a function of rise time of V waveform start-up load current, and IN OUT www.national.com V −V (Continued) IN ...

Page 13

Physical Dimensions inches (millimeters) unless otherwise noted 6-Pin LLP NS Package Number LDE06A 3-Pin DPAK NS Package Number TD03B 13 www.national.com ...

Page 14

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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